I wouldn't say it's that good, they've beaten Sunderland at home, West Ham away and now Villa at home. It's a canny start, but it's not out of this world. They've still got to play all of the decent sides twice.
As has been said, for where they were in March, and with the not insignificant amount of chuckling about Ranieri being named manager, I'd say it has definitely been a very good start. 4 points dropped from 5 games for a team expected to be either relegated or right down there, whatever the opposition, is great.